Abstract
Rheological properties of granular fluids are probed via event-driven simulations of the inelastic hard-sphere model. We find that granular fluids support large normal stress differences for the whole range of densities, clearly indicating their non-Newtonian rheology. Interestingly, both first (N 1) and second (N 2) normal stress differences undergo sign-reversals with density. While N 1 changes its sign in the dense limit, N 2 changes its sign in the dilute limit. The origin of such sign-reversals is tied to the microstructural reorganization of particles and to anisotropy in general. We briefly outline a viscoelastic constitutive model for granular fluids which allows the sign-reversals of both first and second normal stress differences.
Original language | English |
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Title of host publication | Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media |
Pages | 1141-1145 |
Number of pages | 5 |
Publication status | Published - 1 Dec 2005 |
Externally published | Yes |
Event | 5th International Conference on Micromechanics of Granular Media, Powders and Grains 2005 - Stuttgart, Germany Duration: 18 Jul 2005 → 22 Jul 2005 |
Conference
Conference | 5th International Conference on Micromechanics of Granular Media, Powders and Grains 2005 |
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Abbreviated title | PG 2005 |
Country/Territory | Germany |
City | Stuttgart |
Period | 18/07/05 → 22/07/05 |